Designing Games with Game Maker - YoYo Games

0 : stop the path
1: continue from the start position (if the path is not closed we
jump to the start position
2: continue from the current position
3: reverse the path, that is change the sign of the speed
The argument absolute should be true or false. When true the absolute
coordinates of the path are used. When false the path is relative to the current
position of the instance. To be more precise, if the speed is positive, the start
point of the path will be placed on the current position and the path is followed
from there. When the speed is negative the end point of the path will be
placed on the current position and the path is followed backwards from there.
path_end() Ends the following of a path for the current instance.
path_index* Index of the current path the instance follows. You cannot
change this directly but must use the function above.
path_position Position in the current path. 0 is the beginning of the path. 1
is the end of the path. The value must lie between 0 and 1.
path_positionprevious Previous position in the current path. This can be
used e.g. in collision events to set the position on the path back to the
previous position.
path_speed Speed (in pixels per step) with which the path must be followed.
Use a negative speed to move backwards.
path_orientation Orientation (counter-clockwise) into which the path is
performed. 0 is the normal orientation of the path.
path_scale Scale of the path. Increase to make the path larger. 1 is the
default value.
path_endaction The action that must be performed at the end of the path.
You can use the values indicated above.
Motion planning
Motion planning helps you to move certain instances from a given location to a different
location while avoiding collisions with certain other instances (e.g. walls). Motion planning is a
difficult problem. It is impossible to give general functions that will work properly in all
situations. Also, computing collision free motions is a time-consuming operation. So you have